The bow area is probably 6 inches bigger, but it would be hard to claim that you are moving up to a larger bow seating area, because the 240 is so delightfully big up front.
The gas tank on the 270 holds 85 gallons, up from 65 on the 240. That's never bad on a big lake. And, with the 270 and 496, you can pull a fat slalom skier out of the hole pretty effortlessly with 8 people on board and a full gas tank. That impressed me. You need 22 pitch Bravo three props at Powell.
The problem with the 270 is that there weren't very many made. I bet the 240 was made 20-1 over the 270. So, finding a low hour nice fresh water boat is more of a challenge.
Also, A half ton will tow the 240 all day long, which is about 6300 on the trailer without gas, but the 270 is over 8000 with the trailer. Effortless for a diesel, but you feel it more with a half ton. On the flats, you are fine, but up and over Eisenhower tunnel you will be gasping for air.